Telephone IWV to DTMF converter EL-18 (Kit or finished device)
All older devices that have a number switch (dial) work with the pulse dialing method (IWV) and can no longer be operated on VoIP and ALL IP devices. The IWV to DTMF (Dual Tone Multi-Frequency) converter EL-18 converts the pulses of the dial plate into the multi-frequency dialing method (DTMF) and is compatible with the new IP devices.
Attention: This module only works in telephones with a number switch and must be installed.